They tried going back to that a few seasons back, and something must not have tested well, and kids were upset Elmo wasn't on at the end... I forget the inane logic and weird studies... but suffice to say, they WANT to change things back, but they dug themselves into a corner. Now the block format actually increased the ratings, and they're going to stick with that until they start losing viewers again.I agree with you that I think it seems too busy, but not in the same way. I think it seems busy in that there's no underlying connection anymore so things just seem to come and go. The older Sesame street always seemed to have a main story point with the smaller clips showing up in the middle. This way, everything stayed connected but things changed enough to hold your attention. Now, it seems that even if there is an over all theme, they'll do something and then immediately move on to something else and never go back. It seems to give it kind of a disjointed feel in my opinion.
Something tells me Elmo's World is only at the end of the show because they HAVE to have it at the end of the show, and they're too scared to try another episode without one, EVEN though they should have tried that with Elmo heavy episodes, not ones focusing on Baby bear or Prairie Dawn, like they used.